Friday 3_ Work (1).pdf - Friday March 3rd Chapter 5 Energy...

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Friday, March 3 rd Chapter 5: Energy Forms of Energy Energy is scalar Mechanical Energy o Our current focus in class o May be kinetic (associated with motion) or potential (associated with position) Chemical Energy o Ex: car battery, converting sugar to energy in body Electromagnetic Energy o Ex: lights (wavelengths) Nuclear Energy o Ex: nuclear power plant Some Energy Considerations Energy can be transformed from one form to another o Total amount of energy in the universe never changes Can be used in place of Newton’s laws to solve c ertain problems easier Work Work is represented by the variable W Work is a scalar quantity Provides a link between force and energy Work is done by a constant force on an object defined as the product of a component of the force along the direction of displacement and the magnitude of the displacement Does not give information on time it took for displacement to occur nor velocity or acceleration of the object
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